Coupling between electrons and optical phonons in suspended bilayer graphene

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Abstract

Using electrical transport experiments and shot noise thermometry, we investigate electron-phonon heat transfer rate in a suspended bilayer graphene. Contrary to monolayer graphene with heat flow via three-body supercollision scattering, we find that regular electron–optical-phonon scattering in bilayer graphene provides the dominant scattering process at electron energies ≳0.15eV. We determine the strength of these intrinsic heat flow processes of bilayer graphene and find good agreement with theoretical estimates when both zone edge and zone center optical phonons are taken into account.

Details

Original languageEnglish
Article number121414
Pages (from-to)1-5
Number of pages5
JournalPhysical Review B
Volume91
Issue number12
Publication statusPublished - 2015
MoE publication typeA1 Journal article-refereed

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